Sir,
Thanks for producing this great plugin
Can we install the plugin on development websites.

We have the process, by which we are developing the websites at separated domain. After complete development, we transfer this to original domain.
For example http://montes.qdrive.ca will change to http://montes.ca

I've had the plugin installed on many development domains, and transferred it to live domains without any problems. There may be some settings in the DB that relate to the URL, but I always use a search-and-replace script to get the URL's right so if there is anything there it's not an issue.